William t



I (No Model.)

W T. BATE. LOW WATER ALARM.

Patented Jan. 1,1884.

EEWNHW J Q 'Hhi UNITED STATES PATENT WILLIAM T. BATE, or ooNsHoHocKnN,rENNsYL vnNrA;

LOWQWATER ALAR M.

SPECIFICATION forming part of Letters Patent No. 291,272, dated January1, 1884.

Application filed November 6, 1252. (No model.)

To all whom it may concern:

.Be it known that I, WILLIAM 'l. BATE, a citizen of the United States,and a resident of Conshohocken, Montgomery county, Pennsylvania, haveinvented certain Improvements in Low-Water Alarms for Steam-Boilers, ofwhich the following is a specification.

My invention relates to an improvement in that class of low-water alarmsor boiler-feed ers in which the'whistle or feed valve is under thecontrol of a float in a vessel communicating with the boiler, theobjects of my invention being to construct an effective device of thisclass, and to provide for the sounding of an alarm or the control of thewatersupply upon an undue movement of the float in either direction.

In the accompanying drawings, Figure 1 is a side view, partly insection, of my inven tion applied to an alarm forsteam-boilers; Fig. 2,an enlarged perspective view of part of the same, and Fig. 3 a viewshowing a modification of oneof the features of the invention.

is avessel, of any suitable size and shape, communicating at the upperend with the steam-space of the boiler through a valved pipe, at, and atthe lower end with the waterspace of the boiler through a valved pipe,b, so that the'water in the vessel A is always maintained at the samelevel as that in the boiler.

Within the vessel A is a hollow float, B, from which projects a tubularstem, (1, the latter passing through a stuffing-box on the top of thevessel A, and being guided. at the upper end in a bracket, 6, secured toa post, E, projecting from the said vessel A.

To the stem d are secured two tappets, f and g, each having a projectingfinger, the end of which is adapted to a slot in the post E, so that thetappets are prevented from turning on the stem d.

On the steam-pipe a is a branch, h, carrying a steam-whistle, F, ofordinary construction, and on the valve=casing of the whistle areprojecting arms 42 e, to which are hung arm of each lever carries a twobell-crank levers, m and a. The long roller, 19, and the the short armof the lever m is adapted to bear upon the end of the valve-stem w, theshort arm of the lever n being forked, so as to em brace the stem10,.and being adapted to bear upon a shoulder formed upon said stem. As

the water-level in the boiler rises or falls, k

there is a like change in the level of the Water in the vessel, A, andarising-and-fallingmovement of the float B. Should the float fall to anundue extent, the tappet f comes into contact with the roller 1) of thelever m, and actuates the latter so as to impart an inward thrust to thevalve-stem, thereby opening the valve and causing the sounding of thewhistle. Should the float rise above the proper height, the same resultwill be effected through the medium-of the tappetg and lever a. Byproperly adjusting the tappets f and g in respect to each other on thestem (1, any desired amount of rise and fall of the float B may bepermitted before the alarm is sounded.

Instead of using two tappets, f and g, asingletappet may be used, asshown in Fig. 3, said tappet being adapted to act directly upon thelever m, but acting upon the lever a through the medium of a guided rod,x, to a slot in which the tappet is adapted.

In place of or in addition to operating the whistle-valve, the devicemay be employed to operate the valve in the feed-pipe of the boiler, andwhen it is not desired to indicate an undue rise in the water-level, thelever a and the devices'for operating the same may be dispensed with. Asolid stem may be used in place of the tubular stem at; but the latteris preferred, as it prevents the ac cumulation in the float B of waterwhich may gain access thereto, the water being vaporized, and the vaporescaping through the said tubular stem.

In the present instance I have shown the vessel A as provided with thewater-gage usually attached to the head of the boiler. The gage-cocksmay also be applied to the vessel A, and the formation of a numberofopenings in the head of the boiler thus rendered unnecessary.

I claim as my invention 1. The combination of the vessel A,communicating with the steam and water spaces of the boiler. the floatB, having a stem, d, with an adjustable tappet, f, and alarmwhistle andits valve, and a lever, m, adapted to act directly upon the stem of thevalve, and In testimony whereof I have signed my name 10 projecbingintothe path of the tnppetf, as set to this specification in the presence oftwo subforth. scribing witnesses.

2. The combination of the whistle-valve having a stem, w, two levers, mand n, both WILLIAM T. BATE. adapted to act directly upon said stern,the Vessel A, and a float, B, having a stem, (1, \Vitnesses: with tappetor tappets for actuating the levers HARRY DRURY, m and w, as set forth.HARRY SMITH.

